name: Release

on:
  schedule:
    # Run on every first day of the month
    - cron: '0 0 1 * *'
  push:
    tags:
      - '**'

jobs:

  changelog:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v5
        with:
          fetch-depth: 0

      - name: Generate Changelog
        id: changelog
        run: .github/scripts/changelog.sh > CHANGELOG.md
        # When the script returns with an error, it indicates that we don't have
        # any public changes to be released. This is expected behavior, so we
        # quit the workflow successfully in this case.
        continue-on-error: true

      - name: Upload Changelog
        uses: actions/upload-artifact@v5
        if: steps.changelog.outcome == 'success'
        with:
          name: changelog
          path: CHANGELOG.md

      - name: Set version
        id: set_version
        if: steps.changelog.outcome == 'success'
        # Set version depending on whether this is a regular monthly release or
        # a custom release triggered by a tag push.
        run: |
          if [ "${{ github.event_name }}" == "push" ]; then
            VERSION=${{ github.ref_name }}
          else
            VERSION=$(date +'%y.%m.0')
          fi
          echo "VERSION=$VERSION"
          echo "VERSION=$VERSION" >> $GITHUB_OUTPUT

    outputs:
      changeLogOutcome: ${{ steps.changelog.outcome }}
      version: ${{ steps.set_version.outputs.VERSION }}

  release:
    runs-on: ubuntu-latest
    needs: changelog
    if: needs.changelog.outputs.changeLogOutcome == 'success'
    steps:
      - name: Checkout
        uses: actions/checkout@v5
        with:
          fetch-depth: 0

      - name: Download Changelog
        uses: actions/download-artifact@v5
        with:
          name: changelog

      - name: Create Package
        run: tar -czf forgit-${{ needs.changelog.outputs.version }}.tar.gz --exclude LICENSE --exclude README.md *

      - name: Release
        uses: softprops/action-gh-release@v2
        with:
          # The release action implicitly creates the tag if it does not exist.
          tag_name: ${{ needs.changelog.outputs.version }}
          body_path: CHANGELOG.md
          files: forgit-${{ needs.changelog.outputs.version }}.tar.gz